Price Point: $$$. 29. The very front would be the safest place. the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. Well an update on the Sniper install. I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! $102.95. I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. No worse than taking the reading in the intake manifold cross over. The target A/F value based on load or MAF cfm, and engine speed. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. I had the pink ecu signal wire connected to a bullet connector on the passenger side . Yellow Init In First shown for an instant when the system is powered on. Waiting for spring to put back together. Not sure how well the sensor likes being that close to the port. It may not display this or other websites correctly. 10 min read. Sniper EFI 2300 Marine. I am in the middle of a repower of twin BBC 481, mild cam which will need to be recarbureted. Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. Holley EFI Oxygen Sensor. I know from some of the other posts, there have been WBO2 sensor issues. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. So much it could be. If this is a first time effort, find a tuner in your area with marine experience. Do you offer a USCG fuel pump kit? 4. Have to replace head gasket. It looks like another season has come and passed by without the answer you wanted on this.I am impressed that you made the leap into marine fuel injection but you have experienced the same problem that everyone else who has tried this has faced. Could show a lean condition when in fact it really isn't. Most of you only need to tune 4 points, idling around the marina, part throttle - pulling the rope tight, 1/2-3/4 throttle - cruise, and YeeHaa - WOT. According to AEM Electronics, a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: Additionally, if an Sniper or Terminator X EFI System has repeated O2 sensor failures and none of the above-listed suggestions seem likely then contact Holley and arrange to have the unit tested. #1. The wiring was a bit of a mess. Replaced O2 sensor but continued to have AFR issues running too rich. Apr 13, 2017. with the extension. It may not display this or other websites correctly. Once you have those points set, the rest of the map doesn't really matter, just make it look smooth/pretty and everything will be fine. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a "criss-cross" pattern (60-80 in.lbs.). USCG approval is certainly worth careful consideration, as being on a boat that catches on fire is even more serious than being in a car that catches on fire. The Holley Sniper EFI Quadrajet is a self-contained throttle-body injection system that's a direct replacement for spreadbore Quadrajet carburetors found on many classic GM vehicles. blue doberman puppies. Anybody got a good 270hp 350 tune yet?I installed sniper efi on my boat runs good but feel like the wot should be better need to get the sniper controlling spark is my thoughts the old thunderbolt is either not great or timing wasn't right when I bought the boat but she runs great I just think this engine has more in it then I'm getting out of it at this time any tuning and timing advice would be great considering I'm awesome with carb n hei diet but new to efi and boat timing curve but not an idiot so I say. . I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. I have a 74 bronco, 302, mild cam. Find a lower price anywhere and we'll beat it by 5%! Replacement Sniper and Terminator X O2 Sensor. Holley EFI Oxygen Sensor. Finally, do you also recognize that the self-tuning feature of the Sniper EFI may not result in an acceptable configuration for your boat and, as such, may require you to seek professional tuning? Holley Sniper EFI Oxygen Sensors 554-155 Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. And the relay and fuse were mounted along the firewall. Plug into the coolant temperature sensor. But it is going to be a little tricky. As a follow up, I ended up using an eBay type anti fouler elbow for the O2 sensor to try and get it out of the water in the manifolds. ), https://www.ebay.com/sch/i.html?_froensor&_sacat=0, https://www.amazon.com/Bosch-Automot1296929&sr=8-3, https://www.efisystempro.com/wbo2-seer-tbi-554-155, https://forums.holley.com/showthread2927#post82927. Do you also recognize that the O2 sensor that is required for closed-loop operation will not survive in the "wet" manifold used by most marine engines, and that to install a device to protect the O2 sensor from this moisture may require the removal, machining, and replacement of the exhaust manifold? non biased Shelby Cobra related site! Welcome to Club Cobra! If you're thinking that you've read everything above and are ready to toss the carb on your marine engine then take this handy quiz to make sure! We may earn a small commission from affiliate links and paid advertisements. I installed a holley sniper kit. By bypassing the built in pressure regulator in the fuel module(allowing full flow and pressure), using 3/8 hard lines to/from the sniper to meet CG rules( no soft lines on the engine block)using the snipers fuel pressure regulator, This is as close as I can come to safe. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. No matter what I do, it will not start. . The World's largest What you are able to accomplish with a Sniper is done exclusively through the setup wizard application on the 3.5-inch handheld.The Temrinator is designed to be set up with it's own setup wizard on the same 3.5-inch handheld display--but since it has a stand-alone ECU, it can also be fully programmed via the Holley laptop software. You should then have at least 18-24" of pipe after the sensor. 100% identical. This motor would probably turn the berk to 6 grand and blow it out from a stop.Motor dyno'd on a carb @389 hp @ 4700rpm and 497 tq @3500. However, advanced tuning software is available for the Sniper EFI System that allow them to be tuned by a competent professional with experience tuning marine applications. What I installed on the motors was the Holley HP 19lb Holley Injectors the Holley 522-198 duel sync distributors with the MSD Digital 6A and the MSD Blaster 2 coils. $108.95. OP, the Edelbrock system looks to use the same basic sensors as the Holley sniper system: TPS, MAP and O2, plus a few supporting sensors. I myself will convert my 2 302's (Volvo Penta 5.0 l AQ231A) from carbs to EFI; I must find out everything before I start work on the engines, then I am satisfied to start. The Holley Super Sniper High Performance EFI kit comes with a coolant temperature sensor and an O2 sensor, both of which must be used for the EFI to work properly. $43 per night (Latest starting price for this hotel). The fuel pump question is the tough one. Holley EFI has the solutions you need to get your project up and running better than ever! Depending on how fast you want one, there are plenty out there: The Cross ref numbers on the Holley forums and the Net is a Bosch 17025. I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. It will crank and run great for 2-15 seconds then die. However, there's a good chance you will want to add a wideband O2 sensor at some point, in order to give the MegaSquirt more tuning information. Full time feedback from the sensor is what the computer uses to refine the fuel table. Everything about the fuel prime shot can be adjusted. Wideband Oxygen Sensor Extension Cable. Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. I don't have enough experience with marine applications to know exactly what it will take to solve this. There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. With the sniper as long as you locate the o2 sensor where it gets good feedback and stays dry long enough to get a good tune you could lock it so even if the o2s get wet it still runs good. Holley Sniper Marine EFI | Bloodydecks I would send an Email to Chris at EFIsystempro. Categories. p.s. I'm having new headers with an O2 sensor bung installed in my car ('79 Vette) soon, to prepare for a Holley Sniper EFI TBI install this winter. I really dont want any issues on the whitewater lol QFI-500 Oxygen Sensor. I am a competent mechanic and I have checked all the usual suspect items. I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. You need to intimately know the system you are using, its capabilities and limitations, install it correctly and have it tuned with someone with experience specific to marine applications. I am considering the Daytona Sensors Ignition module. Phil is right. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. It works great where its at. Most of Holley's EFI systems provide a Setup Wizard that builds a base configuration file that allows you to start the engine and operate the vehicle. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Fuel prices at the marina are usually about a dollar a gallon more than at the local Racetrac/Wawa/wherever, and even more if you wisely opt for ethanol-free fuel. I am interested in upgrading both engines with Pertronix Ignitor or Ignitor II ignition and the Holley Sniper EFI 2300 and the Howell EFI marine O2 sensor adapter. EFI is the wave of the future. The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Is Holley working on a complete marine package or planning to in the future? For the most part each engine wants a bit of its own timing set-up IMHO, you boat owners with a 270HP 350 (or any other config) may want 350HP but upgrading it to that level will reduce or eliminate reliability. If you are not running the latest software stop guessing and go download it. They have been working out well for a few years now. We use cookies to enhance your experience while using our website. Did a test startup on my new sniper by running the power wire to battery + and not using the o2 sensor.I also capped off the regulated return line with a hose, clamps, and chamfering bit.In the settings I chose closed loop disabled (set to open loop) and also set learn mode to disabled. 5. I have not gone back in to try to fine tune them. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. Since the Sniper install, I encountered my second O2 sensor failure so I thought I would try the "Innovate Bung Extender" recommended by a few folks here. Good luck to all. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. I have searched thru the forum as much as I can, with not much luck. Stock manifolds? Explained: Holley EFI Sensors and What They Do Other than the constraints provided in the article above I see no reason why this wouldn't be a great upgrade. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. All sensors are tested to ensure they accurately report critical engine data to the . It would cost considerably more but a second option that would have added performance benefits would be to switch to a dry manifld such as the headers available from Custom Marine, Inc. Engine Startup Tuning for Sniper and Terminator X Stealth Owners I will keep the in-line pump for a spare. When either of these operating temperature ranges is exceeded, the sensor can no longer be . MAP Sensors. Holley's self learning system is a blessing and a curse. Hooker BlackHeart Oxygen Sensor O2 Bung 2.25" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 3.0" Clamp-On Style, Holley Oxygen Sensor O2 Bung Weld-In Style. May God's grace bless you in the Lord Jesus Christ. I installed it without O2 sensor, adjust on the fly. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. Tune the delay relay timing to just miss the prime shot.For cold starts, a simple push-button or switch "choke" override to power the relay during prime would provide it. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Then if you are do you just wire the o2 sensors in parallel or do these EFI kits have inputs for more than one sensor. Is the O2 sensor on the dyno must have a very long pipe extending past where it is positioned or backwash from the room air will violate the readings as well as any header leaks. Enter The 2023 LS Fest West Trip Sweepstakes Today And Join Us In Las Vegas! Plug-And-Play Compatible with Holley Sniper EFI System, Only for applications that use a Bosch LSU 4.9 0 258 017 025 (17025) Wideband O2 Sensor, Particulates, carbon (e.g. Have you visually verified that all your injectors are spraying? Shop Oxygen Sensors at Summit Racing. O2 sensors are water proof. I tried holley tech support, no answer and put on hold for hours. My hand is holding the connector to the sensor. For a better experience, please enable JavaScript in your browser before proceeding. It does this every time..when you start a warmed up engine, its too rich and starts poorly without throttle. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. Wherever you go, the cultural kaleidoscope of Taipei showcases exhilarating diversity. It flows 850 cfm and can support up to 650 horsepower. Add To Cart. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. Restore or update your Holley Sniper EFI System with this WBO2 Sensor 17025 Bosch 554-155 Holley. I'm looking for some more practical and scenario-specific advice; that's one small piece of it. Ran about 5 seconds and died. Full product line and accessories at excellent pricing. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. Add To Cart. Distributor and ignition box? Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery. #HM206 - ADAPTOR, O2 SENSOR for Marine use - Howell EFI Conversion So please, If you have problems registering or can't log into your account, please. One example of a direction could be an adjustable timed delay-on injector-power relay in the injector power feed wire, delaying 1-second after key-on or whatever is necessary to bypass the prime shot time, only. While this is extremely unlikely if you are having immediate, back-to-back O2 sensor failures you should make the effort to rule this out. With over the transoms you might get away with it if the water is introduced at the very very end, and the O2 is mounted right at the log. In a horizontal or if pointed upwards it can collect exhaust condensation liquids upon start up. We Test It: Holley's New Sniper EFI - MotorTrend Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . The sniper fit perfectly on the intake. For gourmands, night markets not only offer scrumptious small . Followed all the instructions to the letter. I did--- Save your money and piece a fuel it together. The Holley Sniper system sells for $999.95, installs in under 2 hours, and requires only an O2 sensor, a temp sensor (both included), an electric return-style fuel pump, and four-wires to connect.. Quote Reply Topic: Holley Sniper Posted: Jan/05/2022 at 2:01pm . If you've done some automotive fuel map tuning before, you can likely overcome this challenge. Thanks guys. Thanks for that, Danny. Once the tune is complete, the O2 sensor can be defeated or . You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal. check out the. running holley sniper without o2 sensor - dowdcreative.com Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. Replacement Sniper and Terminator X O2 Sensor, This part is legal for sale or use on Racing Use Only Vehicles. EFI System Pro had everything I needed for my EFI upgrade. Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. I have a boat with twin 3.7 Mercruisers. Hello Chris,Ontario's boating season is about to launch for another year.Do you have any good news to add to your above article, any new marine friendly TBI products?In '08,I installed a Holley 21-700 TBI with the o2 mounted in the manifold to Holly specs. Can anyone share their experiences with this type of setup? My question is concerning what happens a year later, when I have a top-end swap . You can selectively provide your consent below to allow such third party embeds. Visit their website for more details. Thanks for the feedback on this adapter, Donald. looking at doing the same. Emissions. The fuel module is self contained with water jacket cooling and contains the low and high pressure pumps. I have a 74 bronco, 302, mild cam. I'll let you know how it works out. Anti-Seize pre-applied to sensor threads. Q3. Holley Sniper EFI Wideband Oxygen Sensor. . Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . In the case of the car, you can generally get out and walk (run?) For this you need a system that can be fully programmed to the extent of the Holley ECU's capability. $5 Off Your $100 Mobile App Purchase . The truck started fine after install, and ran down the road ok. After some time, the truck will not start after it comes to operating temperature. Tech Resources. Sort. Otherwise I have to check for a place in my gasoline tank to put the lines in. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). temporarily running without WBO2 sensor? - Holley All of the wiring begins at the throttle body and connects outward from there. I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. There is no problem getting this tuned and then running open loop. Holley Sniper Efi - Mean Chicken Jet Boat Forum Add To Cart. I would back-burner the ignition control questions until you get the fuel injection working. THen you have to determine if you want 02 readings from one cylinder, or in the case you just mentioned mostly one cylinder, average of 4 cylinders on one bank or the other, or average of all 8 cylinders. For now I have a genuine bosch O2 and Standard Automotive TPS installed. EFI Systems based on Holley's world-class Dominator and HP ECU's. Doesn't look like it will have an O2 sensor. 2. Throttle body mounted ECU - no extra boxes to mount. All times are GMT-6. Go to the web site and it will explain the installation it is very simple and works well.As for the rpm you are comparing to completely different animals (pumps). - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? Part# 550-511. 10 min read Video. After discussing it in this thread and talking with Holley's tech support, I decided . I've installed several of these adaptive EFI's on cars with great success. In Stock.

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